Clamping device for small-aperture cylindrical part

Abstract

The invention provides a small-bore cylindrical part clamping device which comprises a base cylinder and a plurality of supporting assemblies, and the multiple supporting assemblies are installed on the outer wall of the base cylinder and distributed in the circumferential direction of the base cylinder. The supporting assembly comprises a first lever piece, a second lever piece and a driving piece. The first lever piece is rotatably connected with the outer wall of the base cylinder, the first lever piece is provided with a first supporting end and a first connecting end, and under the condition that the first lever piece rotates relative to the base cylinder, the first supporting end and the first connecting end move in opposite directions in the radial direction of the base cylinder. The second lever piece is provided with a second supporting end and a second connecting end, and the second connecting end is rotatably connected with the first connecting end. The driving part is used for driving the second lever part to rotate relative to the first connecting end, so that the first supporting end and the second supporting end synchronously expand or loosen the small-bore cylindrical part, the overall rigidity of the small-bore cylindrical part is enhanced, and then the machining precision of the workpiece can meet the requirement.

Description

Technical Field

[0001] This invention relates to the field of cylindrical component clamping devices, and more specifically, to a small-diameter cylindrical component clamping device. Background Technology

[0002] In the machining of various aero-engine parts, there are often small-diameter, long-overhanging, thin-walled cylindrical parts. For example, the drum shaft, made of powder metallurgy high-temperature alloy, is a typical difficult-to-machine material. In machining the small-diameter outer contour of this long-overhanging, thin-walled cylindrical part, the workpiece's weak rigidity during machining causes vibration during the cutting process, resulting in high cutting resistance and high cutting temperature, which prevents the workpiece from meeting the required machining accuracy.

[0003] Currently, the mainstream method for increasing workpiece rigidity is through internal auxiliary support. Existing internal auxiliary support methods utilize an inner contour support ring, employing four radial bolts to support the inner contour and increase workpiece structural rigidity. However, this method is only suitable for large-diameter cylindrical parts. For drum-shaped workpieces with long overhanging shafts and small-diameter holes, due to the small hole diameter and limited internal space, it is difficult to improve the overall structural rigidity of the workpiece by using an internal support ring to radially support the inner contour, making it difficult for the workpiece to meet machining accuracy requirements. Summary of the Invention

[0004] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0005] The purpose of this invention is to provide a clamping device for small-diameter cylindrical parts, which can improve the technical problem in the prior art that it is difficult to improve the overall structural rigidity of small-diameter cylindrical parts, making it difficult for the workpiece to meet the processing accuracy.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A clamping device for small-diameter cylindrical parts includes a base cylinder and multiple support assemblies, wherein the multiple support assemblies are installed on the outer wall of the base cylinder and distributed along the circumference of the base cylinder;

[0008] The support components include:

[0009] A first lever member is rotatably connected to the outer wall of the base cylinder. The first lever member has a first support end and a first connecting end, which are located at different axial positions of the base cylinder. When the first lever member rotates relative to the base cylinder, the first support end and the first connecting end move in opposite directions in the radial direction of the base cylinder.

[0010] A second lever member, the second lever member having a second support end and a second connecting end, the second connecting end being rotatably connected to the first connecting end; and

[0011] A driving component is disposed between the first connecting end and the second lever component, and the driving component is used to drive the second lever component to rotate relative to the first connecting end, so that the second support end and the first connecting end move in opposite directions in the radial direction of the base cylinder.

[0012] The first support end and the second support end are used to support the inner wall of the small-diameter cylindrical part to tighten the small-diameter cylindrical part.

[0013] Optionally, the first lever member has a first lever segment and a second lever segment connected to each other, and the connection between the first lever segment and the second lever segment is rotatably connected to the outer wall of the base cylinder; the first lever segment includes a first support end, the second lever segment includes a first connection end, and the first lever segment is inclined relative to the second lever segment in a direction away from the base cylinder.

[0014] Optionally, the driving member includes an inclined cone, the axis of which is parallel to the axis of the base cylinder, and the inclined cone is used to move axially along the base cylinder to drive the second lever member to move relatively closer to or relatively further away from the first connecting end.

[0015] Optionally, a support seat is provided at one end of the base cylinder, and the driving component further includes an adjusting bolt screwed to the support seat. One end of the adjusting bolt is rotatably connected to the inclined cone, so as to drive the inclined cone to move along the axial direction of the base cylinder when the adjusting bolt rotates relative to the support seat.

[0016] Optionally, the inclined cone has a middle connecting part, a first inclined arm and a second inclined arm, the first inclined arm and the second inclined arm are respectively disposed on both sides of the middle connecting part, the first inclined arm is movably engaged with the second lever, the second inclined arm is movably engaged with the first connecting end, and the first inclined arm and the second inclined arm are inclined in opposite directions, so as to drive the second lever and the first connecting end to move in opposite directions when the inclined cone moves along the axial direction of the base cylinder.

[0017] Optionally, the second lever is provided with a first sliding guide groove, and the first tilting arm slides into the first sliding guide groove; and / or,

[0018] The first connecting end is provided with a second sliding guide groove, and the second tilting arm slides into the second sliding guide groove.

[0019] Optionally, the support assembly further includes a first support fitting, which is rotatably mounted on the first support end and has a first arc surface. The first arc surface is used to abut against the inner wall of the small-diameter cylindrical part to tighten and support the small-diameter cylindrical part.

[0020] Optionally, the support assembly further includes a second support fitting, which is rotatably mounted on the second support end. The second support fitting has a second arc surface, which is used to abut against the inner wall of the small-diameter cylindrical part to provide expansion support for the small-diameter cylindrical part.

[0021] Optionally, the small-diameter cylindrical component clamping device further includes a rotating shaft and a support seat fixedly installed on the outer wall of the base cylinder. The support seat has a first connecting ear and a second connecting ear spaced apart. The first lever is installed between the first connecting ear and the second connecting ear. The rotating shaft is connected to the first connecting ear, the second connecting ear, and the first lever to rotatably install the first lever on the outer wall of the base cylinder.

[0022] The beneficial effects of the small-diameter cylindrical part clamping device provided in the embodiments of the present invention include:

[0023] An embodiment of the present invention provides a clamping device for small-diameter cylindrical parts, comprising a base cylinder and a plurality of support assemblies. The plurality of support assemblies are mounted on the outer wall of the base cylinder and distributed along the circumference of the base cylinder. Each support assembly includes a first lever, a second lever, and a driving member. The first lever is rotatably connected to the outer wall of the base cylinder and has a first supporting end and a first connecting end. The first supporting end and the first connecting end are located at different axial positions of the base cylinder, and when the first lever rotates relative to the base cylinder, the first supporting end and the first connecting end move in opposite directions radially in the base cylinder. The second lever has a second supporting end and a second connecting end, the second connecting end being rotatably connected to the first connecting end. A driving component is positioned between the first connecting end and the second lever, and is used to drive the second lever to rotate relative to the first connecting end. This allows the second supporting end and the first connecting end to move in opposite directions radially from the base cylinder. In other words, the second supporting end and the first supporting end can move synchronously radially from the base cylinder. The first supporting end and the second supporting segment are used to support the inner wall of the small-diameter cylindrical component. Thus, the first supporting end and the second supporting end synchronously tighten or loosen the small-diameter cylindrical component, thereby strengthening the overall rigidity of the small-diameter cylindrical component and helping to ensure that the workpiece's machining accuracy meets requirements. Furthermore, the tightening of the first supporting end and the second supporting segment is achieved by the axial movement of the driving component, which is positioned on one side of the axial direction, thus helping to reduce the radial space occupied and meeting the space requirements of the small-diameter cylindrical body. Attached Figure Description

[0024] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0025] Figure 1 A schematic diagram of the overall structure of a clamping device for small-diameter cylindrical parts according to one aspect of the present invention is shown;

[0026] Figure 2 A schematic diagram of the structure of the small-aperture cylindrical clamping device according to one aspect of the present invention, when it is expanded inside the small-aperture cylindrical part, is shown from a first-view perspective.

[0027] Figure 3 A schematic diagram of the structure of the small-aperture cylindrical clamping device according to one aspect of the present invention, when it is expanded inside the small-aperture cylindrical part, is shown from a second perspective.

[0028] Figure 4 A cross-sectional structural schematic diagram of a clamping device for small-diameter cylindrical parts according to one aspect of the present invention is shown.

[0029] Figure label:

[0030] 10-Small-diameter cylindrical part clamping device; 100-Base cylinder; 111-Bearing seat; 112-Adjusting reference surface; 210-Support seat; 211-First connecting ear; 212-Second connecting ear; 213-Base; 220-Rotating shaft; 330-Connecting bolt; 300-Support assembly; 310-First lever section; 311-First lever end; 312-Second lever section; 313-First support end; 314-First connecting end; 3 15-Second sliding guide groove; 316-First support fitting; 317-First arc surface; 320-Second lever; 321-Second connecting end; 322-Second support end; 323-First sliding guide groove; 324-Second support fitting; 325-Second arc surface; 330-Drive component; 331-Inclined cone; 332-Intermediate connecting part; 333-First tilting arm; 334-Second tilting arm; 335-Adjusting bolt;

[0031] 20 - Small-diameter cylindrical parts. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0033] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use, and does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] At the same time, it should be noted that the terms "first" and "second" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0035] In the description of this invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Figure 1 This is a schematic diagram of the overall structure of the small-diameter cylindrical part clamping device 10 provided in this embodiment. Figure 2This is a schematic diagram of the structure of the small-diameter cylindrical part clamping device 10 provided in this embodiment when it is tightened inside the small-diameter cylindrical part 20, from a first-view perspective. Figure 3 This is a schematic diagram of the structure of the small-diameter cylindrical part clamping device 10 provided in this embodiment when it is tightened inside the small-diameter cylindrical part 20, from a second perspective. Figure 4 This is a cross-sectional structural diagram of the small-diameter cylindrical part clamping device 10 provided in this embodiment. Please refer to the diagram. Figures 1-4 This embodiment provides a clamping device 10 for small-diameter cylindrical parts, which includes a base cylinder 100 and a plurality of support assemblies 300. The plurality of support assemblies 300 are mounted on the outer wall of the base cylinder 100 and distributed along the circumference of the base cylinder 100. Each support assembly 300 includes a first lever 310, a second lever 320, and a driving member 330. The first lever 310 is rotatably connected to the outer wall of the base cylinder 100 and has a first support end 313 and a first connecting end 314. The first support end 313 and the first connecting end 314 are located at different axial positions of the base cylinder 100, and when the first lever 310 rotates relative to the base cylinder 100, the first support end 313 and the first connecting end 314 move in opposite directions in the radial direction of the base cylinder 100. The second lever 320 has a second support end 322 and a second connecting end 321, and the second connecting end 321 is rotatably connected to the first connecting end 314. The driving member 330 is disposed between the first connecting end 314 and the second lever, and the driving member 330 is used to drive the second lever 320 to rotate relative to the first connecting end 314. Thus, the second supporting end 322 and the first connecting end 314 move in opposite directions radially in the base cylinder 100. In other words, the second supporting end 322 and the first supporting end 313 can move synchronously radially in the base cylinder 100. The first supporting end 313 and the second supporting section are used to support the inner wall of the small-diameter cylindrical part 20. Thus, the first supporting end 313 and the second supporting end 322 synchronously tighten or loosen the small-diameter cylindrical part 20, thereby strengthening the overall rigidity of the small-diameter cylindrical part 20, which helps to ensure that the machining accuracy of the workpiece meets the requirements. Moreover, the tightening of the first supporting end 313 and the second supporting section is achieved by the axial movement of the driving member 330, which is disposed on one side of the axial direction, thereby helping to reduce the radial space occupied and meeting the space requirements of the small-diameter cylindrical body.

[0037] The small-diameter cylindrical part clamping device 10 provided in this embodiment will be described in detail below:

[0038] Please refer to the reference. Figures 1-4 In this embodiment, the base cylinder 100 is a cylindrical structure with a radial dimension smaller than that of the small-diameter cylindrical part 20 to be clamped, and multiple support components 300 are arranged along the circumference of the base cylinder 100 (e.g., Figure 1As shown in the R direction, the base cylinder 100 is inserted into the small-diameter cylindrical part 20 to be clamped during clamping. Multiple support components 300 are distributed along the circumference of the small-diameter cylindrical part 20 in the space between the inner circumferential surface of the small-diameter cylindrical part 20 and the outer wall of the base cylinder 100. The small-diameter cylindrical part 20 is clamped by the support and tightening of the inner circumferential surface of the small-diameter cylindrical part 20 by the multiple support components 300, which also helps to enhance the overall rigidity of the small-diameter cylindrical part 20.

[0039] Optionally, in this embodiment, six support components 300 are distributed circumferentially along the base cylinder 100. It is understood that in other embodiments, the number of support components 300 can be specifically set according to needs, such as four or eight.

[0040] In this embodiment, the multiple support components 300 have the same structure. Specifically, each support component 300 includes a first lever 310, which is rotatably mounted on the outer wall of the base cylinder 100. Optionally, the first lever 310 includes a first lever segment 311 and a second lever segment 312 connected to each other. The connection between the first lever segment 311 and the second lever segment 312 is rotatably connected to the outer wall of the base cylinder 100, and both the first lever segment 311 and the second lever segment 312 are approximately along the axial direction of the base cylinder 100 (e.g., ...). Figure 4 Extending in the X direction (as shown), the first lever segment 311 and the second lever segment 312 are located at different axial positions of the base cylinder 100. Correspondingly, when the small-aperture cylindrical part clamping device 10 extends into the small-aperture cylindrical part 20 to be clamped, the first lever segment 311 and the second lever segment 312 are located at different axial positions of the small-aperture cylindrical part 20. A portion of the first lever segment 311 forms a first support end 313, that is, the first lever segment 311 includes the first support end 313, and a portion of the second lever segment 312 forms a first connecting end 314, that is, the second lever segment 312 includes the first connecting end 314. At the same time, the first lever segment 311 is inclined relative to the second lever segment 312 in a direction away from the base cylinder 100.

[0041] Optionally, the small-diameter cylindrical part clamping device 10 further includes a rotating shaft 220 and a support seat 210 fixedly installed on the outer wall of the base cylinder 100. The support seat 210 has a first connecting ear 211 and a second connecting ear 212 spaced apart. A first lever 310 is installed between the first connecting ear 211 and the second connecting ear 212. The rotating shaft 220 is connected to the first connecting ear 211, the second connecting ear 212 and the first lever 310, thereby rotatably installing the first lever 310 on the outer wall of the base cylinder 100.

[0042] Specifically, there are multiple support seats 210 and rotating shafts 220, and the number of support seats 210 and rotating shafts 220 can be set to be consistent with the number of support components 300 to ensure the rotatable installation of multiple support components 300. The support seat also has a base 213 located between the first connecting ear 211 and the second connecting ear 212. The base 213 is provided with mounting holes for connecting bolts 230 to pass through. After passing through the mounting holes, the connecting bolts 230 are screwed to the base cylinder 100, thereby fixing the base 213 to the base cylinder 100. The first connecting ear 211, the second connecting ear 212 and the first lever member 310 are all provided with pivot holes. The rotating shaft 220 passes through the pivot holes of the first connecting ear 211, the first lever member 310 and the second connecting ear 212 in sequence, thereby rotatably installing the first lever member 310 on the base cylinder 100. The pivot holes on the first lever member 310 are located at the connection between the first lever segment 311 and the second lever segment 312.

[0043] It should be noted that the rotational connection structure between the base cylinder 100 and the first lever 310 is not limited here. It is understood that in some other embodiments, other methods can also be used to achieve the rotational connection between the base cylinder 100 and the first lever 310.

[0044] In this embodiment, the second lever 320 is rotatably mounted on the second lever segment 312. The portion between the connection point of the second lever 320 and the second lever segment 312 and the end of the second lever segment 312 furthest from the first lever segment 311 can be considered as the first connecting end 314. The end of the second lever 320 rotatably connected to the second lever segment 312 is the second connecting end 321 of the second lever 320, and the other part of the second lever 320 is the second support end 322. After the second lever 320 is rotatably mounted on the second lever segment 312, the second lever 320 and the first connecting end 314 form a V-shaped structure. The opening angle of the V-shaped structure can be changed by the rotation of the second lever 320 relative to the first connecting end 314. During the axial movement of the driving member 330 along the base cylinder 100, the second lever 320 and the first connecting end 314 are driven to open and close, thereby causing the second support end 322 and the first connecting end 314 to be in the radial direction of the base cylinder 100 (e.g., Figure 4 It moves in the opposite direction (Y direction) in the middle.

[0045] Specifically, when the driving member 330 moves along the axial direction of the base cylinder 100 towards the connection between the second lever member 320 and the first lever member 310 (i.e., along the axial direction of the base cylinder 100), Figure 4When the image shown on the right moves, the second support end 322 opens outward, and correspondingly, the first connecting end 314 moves towards the base cylinder 100. The movement of the first connecting end 314 towards the base cylinder 100 drives the first support end 313 to move away from the base cylinder 100. In this way, the first support end 313 and the second support end 322 move outward synchronously, which helps to achieve synchronous support. Moreover, since the first support end 313 and the second support end 322 with different axial positions of the small-diameter cylindrical part clamping device 10 provide synchronous support, it helps to enhance the overall rigidity of the small-diameter cylindrical part 20 with long overhang structure.

[0046] Optionally, in this embodiment, the driving member 330 includes an inclined cone 331, the axis of which is parallel to the axis of the base cylinder 100, and the inclined cone 331 is used to move along the axial direction of the base cylinder 100 to drive the second lever member 320 to move relatively closer to or relatively farther away from the first connecting end 314.

[0047] Specifically, in this embodiment, the inclined cone 331 has a middle connecting portion 332, a first inclined arm 333, and a second inclined arm 334. The first inclined arm 333 and the second inclined arm 334 are respectively disposed on both sides of the middle connecting portion 332. The first inclined arm 333 is movably engaged with the second lever 320, and the second inclined arm 334 is movably engaged with the first connecting end 314. The inclination directions of the first inclined arm 333 and the second inclined arm 334 are opposite. Therefore, when the inclined cone 331 moves along the axial direction of the base cylinder 100, the first inclined arm 333 pushes the second lever 320 to move, and the second inclined arm 334 pushes the first connecting end 314 to move. The movement directions of the second lever 320 and the first connecting end 314 are opposite. Specifically, the first inclined arm 333 and the second inclined arm 334 form an arrow-shaped structure.

[0048] It should be noted that the specific structure of the inclined cone 331 is not specified here. It is understood that in other embodiments, the structure of the inclined cone 331 can also be set according to the requirements, such as setting the inclined cone 331 to be conical.

[0049] Furthermore, the second lever 320 is provided with a first sliding guide groove 323, and the first tilting arm 333 is slidably engaged in the first sliding guide groove 323, so that while ensuring that the movement of the first tilting arm 333 can drive the second lever 320 to rotate, the relative position of the second lever 320 and the first tilting arm 333 can be kept in the first sliding guide groove 323.

[0050] Similarly, in this embodiment, the first connecting end 314 is provided with a second sliding guide groove 315, and the second tilting arm 334 is slidably engaged in the second sliding guide groove 315, thereby ensuring that the movement of the second tilting arm 334 can drive the first connecting end 314 to rotate, while also ensuring that the relative position of the first connecting end 314 and the second tilting arm 334 is in the second sliding guide groove 315.

[0051] In this embodiment, a support seat 111 is provided at one end of the base cylinder 100, and the driving member 330 also includes an adjusting bolt 335 screwed to the support seat 111. One end of the adjusting bolt 335 is rotatably connected to the inclined cone 331. Thus, when the adjusting bolt 335 rotates, the adjusting bolt 335 can move relative to the support seat 111 in the axial direction of the base cylinder 100, thereby pushing the inclined cone 331 to move along the axial direction of the base cylinder 100.

[0052] Specifically, the support seat 111 is located at the end of the base cylinder 100. Thus, after the small-diameter cylindrical part clamping device 10 is installed in the small-diameter cylindrical part 20, part of the adjusting bolt 335 can be located outside the small-diameter cylindrical part 20, facilitating adjustment. The adjusting bolt 335 is rotatably connected to the intermediate connecting part 332 of the inclined cone 331. The radial position of the adjusting bolt 335 in the base cylinder 100 does not change with the screwing in and out of the adjusting bolt 335. Correspondingly, when the driving member 330 drives the tightening or loosening, the radial position of the inclined cone 331 in the base cylinder 100 does not change. The first connecting end 314 and the second support end 322 move synchronously in opposite directions radially in the base cylinder 100. Simultaneously, the end face of the base cylinder 100 can be used as the adjustment reference surface 112 during adjustment.

[0053] The tightening and loosening operations are controlled by adjusting the rotation of bolt 335. In this way, multiple support components 300 can be operated independently. When the radial dimensions of the inner wall of the small-diameter cylindrical part 20 are slightly deviated, that is, when the inner wall of the small-diameter cylindrical part 20 cannot achieve a high degree of roundness, it can better adapt to the size changes and ensure effective tightening at various points.

[0054] It should be noted that in this embodiment, the axial movement of the inclined cone 331 along the base cylinder 100 is achieved by rotating the adjusting bolt screwed to the bearing seat 111. It is understood that in some other embodiments, other methods can also be used, such as directly setting the inclined cone 331 as a conical structure screwed to the first connecting end 314 and the second lever 320. In this way, the opening or closing of the first connecting end 314 and the second lever 320 can be achieved by rotating the inclined cone 331.

[0055] In this embodiment, the support assembly 300 further includes a first support fitting 316, which is rotatably mounted on the first support end 313. The first support fitting 316 has a first arc surface 317, which is used to abut against the inner wall of the small-diameter cylindrical part 20 to provide expansion support for the small-diameter cylindrical part 20. By providing the first support fitting 316 and rotatably mounting it on the first support end 313, the first support end 313 supports the inner wall of the small-diameter cylindrical part 20 through the first support fitting 316. Simultaneously, the rotating structure allows the first support fitting 316 to adapt to the inner wall surface of the small-diameter cylindrical part 20, forming a surface contact, thereby supporting the inner wall surface and ensuring the rigidity of the processed structure. Specifically, the first support fitting 316 is rotatably connected to the first support end 313 via a hinge.

[0056] In this embodiment, the support assembly 300 further includes a second support fitting 324, which is rotatably mounted on the second support end 322. The second support fitting 324 has a second arc surface 325, which is used to abut against the inner wall of the small-diameter cylindrical part 20 to provide expansion support for the small-diameter cylindrical part 20. By providing the second support fitting 324 and rotatably mounting it on the second support end 322, the second support end 322 supports the inner wall of the small-diameter cylindrical part 20 through the second support fitting 324. Simultaneously, the rotatable structure allows the second support fitting 324 to adapt to the inner wall surface of the small-diameter cylindrical part 20, forming a surface contact, thereby supporting the inner wall surface and ensuring the rigidity of the processed structure. Specifically, the second support fitting 324 is rotatably connected to the second support end 322 via a hinge.

[0057] The small-diameter cylindrical part clamping device 10 provided in the embodiments of the present invention is used as follows: First, the small-diameter cylindrical part clamping device 10 is installed, and the end away from the adjusting bolt 335 is inserted into the outer stop of the end face of the machine tool chuck to complete the connection and positioning. Then, correction is performed to ensure that the base cylinder 100 is concentric with the machine tool spindle and the Z-direction end face is perpendicular. Then, the multiple support components 300 are adjusted so that the radial position of the first arc surface 317 and the second arc surface 325 is smaller than the inner hole size of the small-diameter cylindrical part 20. For example, the deviation between the first arc surface 317 and the second arc surface 325 and the inner hole size of the small-diameter cylindrical part 20 is 0.3mm, and the six sets of first arc surfaces 317 and second arc surfaces 325 are adjusted to be on the same circumference. This completes the preparation work before clamping.

[0058] During clamping, the small-diameter cylindrical component 20 to be clamped is placed over the decoration, and the diagonal adjusting bolts 335 are used to tighten the small-diameter cylindrical component 20. Then, the adjusting bolts 335 are finely adjusted to recheck the inner circle of the small-diameter cylindrical component 20. The end face reference is 0.02. The force of the adjusting bolts 335 in the multiple support components 300 is confirmed to ensure that the force of each support point is uniform. The small-diameter cylindrical component 20 is checked to ensure that there is no deformation due to the tightening force until the inner circle reference roundness end face is within 0.02. At this time, the clamping is completed.

[0059] The small-diameter cylindrical part clamping device 10 adjusts the internal tensioning force through the axial movement of the drive component 330, greatly improving the operating space. Furthermore, the drive component 330 is operated using an externally located adjusting bolt 335, ensuring operability and improving clamping efficiency, achieving external operation and internal tensioning. Each support assembly 300, through an adjusting bolt 335, pushes two levers to achieve synchronous tensioning of the two support components at different axial positions of the small-diameter cylindrical part 20. The device features a compact structure, uniform force distribution, and good overall rigidity. It offers good operability and versatility for long, thin-walled, overhanging parts with small inner diameters and limited operating space.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A clamping device for small-diameter cylindrical parts, characterized in that, The small-diameter cylindrical component clamping device includes: The base cylinder and multiple support components are mounted on the outer wall of the base cylinder and distributed circumferentially along the base cylinder. The support components include: A first lever member is rotatably connected to the outer wall of the base cylinder; the first lever member has a first support end and a first connecting end, the first support end and the first connecting end are located at different axial positions of the base cylinder, and when the first lever member rotates relative to the base cylinder, the first support end and the first connecting end move in opposite directions in the radial direction of the base cylinder. A second lever member, the second lever member having a second support end and a second connecting end, the second connecting end being rotatably connected to the first connecting end; and A driving component is disposed between the first connecting end and the second lever component, and the driving component is used to drive the second lever component to rotate relative to the first connecting end, so that the second support end and the first connecting end move in opposite directions in the radial direction of the base cylinder. The first support end and the second support end are used to support the inner wall of the small-diameter cylindrical part to tighten the small-diameter cylindrical part.

2. The clamping device for small-diameter cylindrical parts according to claim 1, characterized in that, The first lever has a first lever segment and a second lever segment connected to each other, and the connection between the first lever segment and the second lever segment is rotatably connected to the outer wall of the base cylinder; the first lever segment includes a first support end, the second lever segment includes a first connection end, and the first lever segment is inclined relative to the second lever segment in a direction away from the base cylinder.

3. The clamping device for small-diameter cylindrical parts according to claim 1, characterized in that, The driving component includes an inclined cone, the axis of which is parallel to the axis of the base cylinder, and the inclined cone is used to move along the axial direction of the base cylinder to drive the second lever to move relatively closer to or relatively further away from the first connecting end.

4. The clamping device for small-diameter cylindrical parts according to claim 3, characterized in that, A load-bearing seat is provided at one end of the base cylinder. The driving component also includes an adjusting bolt screwed to the load-bearing seat. One end of the adjusting bolt is rotatably connected to the inclined cone so that when the adjusting bolt rotates relative to the load-bearing seat, it drives the inclined cone to move along the axial direction of the base cylinder.

5. The clamping device for small-diameter cylindrical parts according to claim 3, characterized in that, The inclined cone has a middle connecting part, a first inclined arm and a second inclined arm. The first inclined arm and the second inclined arm are respectively disposed on both sides of the middle connecting part. The first inclined arm is movably engaged with the second lever, and the second inclined arm is movably engaged with the first connecting end. The first inclined arm and the second inclined arm are inclined in opposite directions, so as to drive the second lever and the first connecting end to move in opposite directions when the inclined cone moves along the axial direction of the base cylinder.

6. The clamping device for small-diameter cylindrical parts according to claim 5, characterized in that, The second lever is provided with a first sliding guide groove, and the first tilting arm slides into the first sliding guide groove; and / or, The first connecting end is provided with a second sliding guide groove, and the second tilting arm slides into the second sliding guide groove.

7. The clamping device for small-diameter cylindrical parts according to claim 1, characterized in that, The support assembly further includes a first support fitting, which is rotatably mounted on the first support end and has a first arc surface. The first arc surface is used to abut against the inner wall of the small-diameter cylindrical part to expand and support the small-diameter cylindrical part.

8. The clamping device for small-diameter cylindrical parts according to claim 1, characterized in that, The support assembly further includes a second support fitting, which is rotatably mounted on the second support end. The second support fitting has a second arc surface, which is used to abut against the inner wall of the small-diameter cylindrical part to tighten and support the small-diameter cylindrical part.

9. The clamping device for small-diameter cylindrical parts according to any one of claims 1-8, characterized in that, The small-diameter cylindrical component clamping device further includes a rotating shaft and a support seat fixedly installed on the outer wall of the base cylinder. The support seat has a first connecting ear and a second connecting ear spaced apart. The first lever is installed between the first connecting ear and the second connecting ear. The rotating shaft is connected to the first connecting ear, the second connecting ear and the first lever to rotatably install the first lever on the outer wall of the base cylinder.

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